Acoustic attenuation device for an aircraft propulsion unit
US-12509215-B2 · Dec 30, 2025 · US
comprising protuberances, e.g. for modifying boundary layer flow
comprising protuberances, e.g. for modifying boundary layer flow · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B64C2003/148 |
| Official title | {comprising protuberances, e.g. for modifying boundary layer flow} |
| Display label | comprising protuberances, e.g. for modifying boundary layer flow |
| Total patents | 49 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 3 |
| 2017 | 7 |
| 2018 | 4 |
| 2019 | 8 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 7 |
| 2023 | 6 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Improved acoustic attenuation device for an aircraft propulsion unit
US-2024059396-A1 · Feb 22, 2024 · US
Rotary airfoil with reduced acoustic output
US-11905009-B2 · Feb 20, 2024 · US
Profiled structure and associated turbomachine
US-11859534-B2 · Jan 2, 2024 · US
Stall trigger system
US-11845539-B2 · Dec 19, 2023 · US
Ridge structure, wing, design method of ridge structure, and design program for the same
US-2023373609-A1 · Nov 23, 2023 · US
Method For Controlling Vertical Take-Off And Landing Aircraft Using Different Propeller Blade Angle Of Attack Ranges For Different Flight Modes
US-2023365255-A1 · Nov 16, 2023 · US
Method For Controlling Vertical Take-Off And Landing Aircraft Using Different Propeller Blade Angle Of Attack Ranges For Different Flight Modes
US-2023322362-A1 · Oct 12, 2023 · US
Flow body for an aircraft with a selectively activatable shock bump
US-11780566-B2 · Oct 10, 2023 · US
Aircraft wing assemblies
US-11584506-B2 · Feb 21, 2023 · US
Shock wave suppression device and aircraft
US-11530029-B2 · Dec 20, 2022 · US
Rotary Airfoil With Reduced Acoustic Output
US-2022297833-A1 · Sep 22, 2022 · US
Flow Body For An Aircraft With A Selectively Activatable Shock Bump
US-2022258853-A1 · Aug 18, 2022 · US
Rotary airfoil and design therefore
US-11407510-B2 · Aug 9, 2022 · US
Stall trigger system
US-2022194563-A1 · Jun 23, 2022 · US
Air acceleration at leading edge of wing
US-2022111951-A1 · Apr 14, 2022 · US
Aerodynamic structure for aircraft wing
US-11247769-B2 · Feb 15, 2022 · US
Aircraft rotor blade sleeve having a protuberance in its rear zone, and a rotor provided with such a sleeve
US-11192644-B2 · Dec 7, 2021 · US
Rotary airfoil and design therefore
US-2021253236-A1 · Aug 19, 2021 · US
Shock wave suppression device and aircraft
US-2021253226-A1 · Aug 19, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64C2003/148?
- CPC B64C2003/148 is the Cooperative Patent Classification code for “comprising protuberances, e.g. for modifying boundary layer flow.”
- How many patents are filed under CPC B64C2003/148 (comprising protuberances, e.g. for modifying boundary layer flow)?
- Our database includes 49 publications tagged with this CPC code.
- Is patent activity under CPC B64C2003/148 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).